I have Dynaudio Focus 140s and Focus 220s and love them both. However, although close, they do not sound the same.
Aside from the expected greater presence in the lower and mid bass, the Focus 220s surpirsingly (by my ears of course) differ more significantly in the area of the upper midrange and treble (which is more open and clear with the 220s). The Focus 140s sound a little smoother and the 220s slightly more brassy in the upper midrange, but in a good way.
In all fairness, I have not fully broken in the 220s or the 140s yet, and although some of this may smooth out a little, the crossover difference (from my understanding lower on the 220) should still produce a different sound in the 220s over the 140s. So, the 220s aside from having a bit more bass, sound more diffent in having a clearer slightly more piercing sound (but not harsh) in the upper midrange. I personally prefer the 220 slightly more in that regard over the 140s, but am hoping that the more open upper midrange softens just a little as the speakers break in.
I know from listening and using a subwoofer with both, that a good musical subwoofer (REL, MJ Acoustics - my MJ sub is great by the way), running with the 140s will sound much better than the 220s by themselves in the bass department. So if you are watching your money, the Focus 140s with a musical sub is your best bet and will actually put out more better sounding bass than a stand alone pair of Focus 220s for a combined price roughly equal to the Focus 220s. (I strongly recommend an REL or MJ Acoustics sub if quality musical bass for music rather than home theater is what you want).
However, the 220s with one of these subs sounds much better yet also than standing alone. Overall, I feel that unless you want the more open midrange with the 220s, you will be better off if money is an object, in buying the Focus 140s and adding a good musical subwoofer. I love my MJ Acoustics sub. It makes the Dyns sound like they came with smooth powerful and tight 10" woofers. It is a very very musical sub and not boomy like your typical Velodyne or for that matter Martin Logan subs. When I turn on the sub, even the 220s (which have good bass by the way) almost double in equivalent size. Its as if the lights just went on in a dark room. The music becomes rich, meaty, and full like it would be at a concert.
Aside from the expected greater presence in the lower and mid bass, the Focus 220s surpirsingly (by my ears of course) differ more significantly in the area of the upper midrange and treble (which is more open and clear with the 220s). The Focus 140s sound a little smoother and the 220s slightly more brassy in the upper midrange, but in a good way.
In all fairness, I have not fully broken in the 220s or the 140s yet, and although some of this may smooth out a little, the crossover difference (from my understanding lower on the 220) should still produce a different sound in the 220s over the 140s. So, the 220s aside from having a bit more bass, sound more diffent in having a clearer slightly more piercing sound (but not harsh) in the upper midrange. I personally prefer the 220 slightly more in that regard over the 140s, but am hoping that the more open upper midrange softens just a little as the speakers break in.
I know from listening and using a subwoofer with both, that a good musical subwoofer (REL, MJ Acoustics - my MJ sub is great by the way), running with the 140s will sound much better than the 220s by themselves in the bass department. So if you are watching your money, the Focus 140s with a musical sub is your best bet and will actually put out more better sounding bass than a stand alone pair of Focus 220s for a combined price roughly equal to the Focus 220s. (I strongly recommend an REL or MJ Acoustics sub if quality musical bass for music rather than home theater is what you want).
However, the 220s with one of these subs sounds much better yet also than standing alone. Overall, I feel that unless you want the more open midrange with the 220s, you will be better off if money is an object, in buying the Focus 140s and adding a good musical subwoofer. I love my MJ Acoustics sub. It makes the Dyns sound like they came with smooth powerful and tight 10" woofers. It is a very very musical sub and not boomy like your typical Velodyne or for that matter Martin Logan subs. When I turn on the sub, even the 220s (which have good bass by the way) almost double in equivalent size. Its as if the lights just went on in a dark room. The music becomes rich, meaty, and full like it would be at a concert.