Nagaoka MP-150 vs MP-200


I recently upgraded my turntable which came with a Naga MP-150.  I like the 150, but can't help wondering how much difference a 200 stylus would make.  For anyone with experience with both, I welcome your thoughts. (Previously I had a Signet TK5e for many years, which I was happy with. Anyone happen to know what current cartridge would be closest sounding to that?)
128x128xs1137
Scott,   thanks for the link.  Just trying to figure where I'll get the most improvement for the next $ I spend, since my budget is currently limited.  Under consideration are the MP-200 stylus or upgraded NOS preamp tubes.  :)
Previously I had a Signet TK5e for many years, which I was happy with.

@xs1137
You should ask @nandric , he’s got Signet TK-5E and better models, I’m sure you could buy NOS. Signet are better than Nagaoka in my opinion.