Not 100% sure if it's better... But since the difference in dollars is minimal, I'd check it out if it truly is a direct replacement.
I use a shelter 201 cartridge on my SR-838... I like it but will probably look at something else more dynamic. Another suggestion that's out there is the Grace F-9 cart. Both of these are MM carts. The Grace may be tough to track down in new condition.
I am considering a move to the Ortofon Black mm cart in the near future. It's a bit more expensive but highly regarded.
Regardless of what you decide, never get rid of this table!
What other Sansui models do u have?