Hi Dayvan,
no easy answer there, it will depend more on the arm, deck and what works best with both.
For example I recently bought one of those cheap NOS nagaoka MP10 for £20 which is a bargain for a cart worth closer to £80 as the current model. The MP-10 works a treat on my Thoren 166 with a stock TP-55 arm, with a nice solid sound. It was a big improvement on the perennial fave cheapie cart AT-95.
Although the thorens did sound better with an exxy AT OC-9 fitted, the difference was not night and day.
With a better arm, I am sure the Thorens could take a better cart, but to me a sub £100 cart such as the Nag MP10 seems a sensible match, playing to the strengths of the deck rather than exposing its weaknesses as a better cart might.