Are integrated amps technically better than separates?

For amps probably up to around 100/150 watts/channel RMS, integrated ones are just as good as separate units as far as sound quality is concerned and definitely better in terms of physical space occupation.

For devices above those ratings, and especially for class A devices, power supplies become the dominant factor and therefore separate units are usually a bit better.

But for most part for the average listener, typically integrated units are easier to set up and they need less space & wiring.

99.9% of people will not notice the difference.  The other 0.1 % will pretend they hear the difference :-)

@erniesch, finally someone with a bit of sense.  Thank you....

AT MOST, a 12 to 13 gauge wire is enough for 99% of almost all home amplifiers/subwoofers etc, up to approx 200Watts RMS/channel.  Its ohmic resistance will be no more than 0.02 ohms for a 10 ft cable and will allow EASILY up to 7 amps (and that is very conservative, max is 30) giving approximately 850 watts.  And the skin effect will be negligible until about 5300Hz.  Since mains is at 60 Hz, there is essentially no skin effect.  Here is the chart:

https://www.powerstream.com/Wire_Size.htm

And for monster amplifiers like 1000 watts/channel, you can always have a dedicated 50 amp cooker/range cable installed but think... how many times in your life do you crank up that volume to that level for long periods of listening ?