Itchy, huh? You have done it to yourself. Couldn't wait, upgraded. Now you have a problem don't you? ;)
Let me guess, you are selling, or have sold the other amp. That would be the classic mistake, rather than trying both on the new speakers incoming. (Unless you absolutely have no money to hold the one until compared)
No one here can tell you which you would prefer, especially when amps are thrown into the picture. You simply have to try all iterations to assure your best result. Any other answer is guesswork. You simply have to try all amps, all speakers in discrete systems. There are thousands of iterations (I am being conservative) with fundamentally different characteristics. You'll get every bit as dramatic changes with different speakers, cables, etc. ALL speakers are subject to such upgrades/dramatic changes with amps. That's no shocker.
Changing cables midstream, and looking for certainty? Not possible. You are manipulating multiple aspects of the system and will not find certainty on your expenditures. You simply have to make a choice and go with it. The less items you end up with - speakers, amps, cables - to compare in iterations of rigs, the less your chance of building a dream result. The more you have to build iterations, the better the outcome.
Then, just wait; you'll adore two different rigs. Then, you have a different problem! :)
Guidance doesn't get any clearer than that.