Systems comparison

I have two systems

Both have acoustat trans nova 200 amp

both have dynavector Ruby low output mc cartridge 

1st system has arc sp 6 preamp second system has acoustat tnp preamp

first system has thoren 165 turntable 

2nd system has sme 3 arm


question is what are weak point(s) of each system

2nd question is if acoustat preamp is weak point what used arc preamp would you recommend?

also add any suggestions


Plus you need to measure each system to compare, see my virtual system for an example

What was really looking for was

what is the first place you look to improve either system and what you replace it with