Jelco vs Rega


I have an Avid Diva II TT with the Jelco ST 250 arm. Would changing the arm to a Rega RB 301 be a worthwhile upgrade or would it just be a lateral move or worst yet, be a downgrade. Thanks.
rsfphil
I put an Origin Illustrious arm on my Avid TT and the results were really great. Ortofon, P Windfield Cart is outstanding with this set up also.
Dear Rsfphil: The Jelco tonearm have to me an additional advantage due that it is a removable headshell design that permit ( changing different build/weight material hedashells. ) a better match between cartridge and the tonearm to have the " best " cartridge quality performance.

Regards and enjoy the music,
Raul.
Dear Rsfphil: My mistake, I don't read the " ST " that is the one from Jelco that is non-removable headshell design against the SA-250 that comes with removable headshell.

Regards and enjoy the music,
Raul.