Power Devices for F5Turbo and how does the F5 sound

Hello everyone out there!

I have been a passive reader of this forum for many years. Unfortunately I couldn't log in anymore, so I registered again today.
I learned a lot here, special thanks to dad Mr. Nelson Pass for his great work and creativity.

I built an ACA in parallel output configuration with a linear power supply as monoblocks.
Sony's Sony TA-NR 1 monoblocks are available to me as reference amplifiers.
Dynaudios Confidence C1 must be powered.

Now I have the following problem:
The Sonys offer clarity, spaciousness, resolution in the high frequency range and the ACA brings the warmth and grace in the voices to my ears.
I don't want to do without both, so I would like to build the F5Turbo or the AlephJ or the F6.
Can you please briefly explain the tonal differences between the three amplifiers?
What could be the best amp for the Confidence C1?
The F5 has the most power...but is wattage everything?

A specific question:
On 2009-08-10 Mr. Pass wrote:
One of my current favorite mosfet pairs, the Fairchild FQA12P20 and
FQA19N20C are scheduled to be discontinued before the end of the year.
And John China: I use FQA16N25C and FQA9P25.

Unfortunately the FQA 12N20/19P20 are no longer available, I can still find some 16N25/9P25 suggested by John China.
Do these offer me a sonic advantage over the generic IFRP240/IFRP9240?

Thank you for your help, greetings from Franconia in Germany!
Mike