Gamo Redfire VS Polymag/Polymag shorts

Never shot the Gamos but the Polymags are deadly in all 4 calibers in my guns. If you're thinking about it and want to save a few bucks, you can try here:

https://predatorpellets.com/product-category/dent/

Don't let the dent part scare you away. I've bought more than a few tins and never got anything dented, just off center labels.

Is there a big difference between the 'standard' Polymags and the shorts?