Magnet swap for a P90 pickup in an Epiphone Les Paul jr. Polished vs Rough cast. Any difference?

Replacing the stock magnets in a P90 from "polished" AlNiCo 5 magnets to Rough Cast. Testing the tones from AlNiCo 5, 4, 3 and 2 and also some combinations of these. Marginal differences in tone, but is it enough to choose to swap magnets? The pickup is made after my tone preference by Evil Sheep Guitar Pickups.

Watch the initial video where this guitar came to be:    • Epiphone Les Paul junior with P90 (Ev...  

00:00 Intro tones
00:24 Intro talk
01:50 AlNiCo V - Polished magnets
02:18 AlNiCo V - Rough Cast magnets
02:46 AlNiCo II - Rough Cast magnets
03:12 AlNiCo II and V - Rough Cast magnets
03:39 AlNiCo III and V - Rough Cast magnets
04:12 AlNiCo IV and V - Rough Cast magnets
04:48 Revisiting the AlNiCo V - Polished magnets
05:16 Overdrive added with AlNiCo IV and V - Rough Cast magnets
06:45 Ain't no sunshine - instrumental versjon

Gear used:
Epiphone Les Paul junior with P90 pickup from Evil Sheep Guitar Pickups
Clone of a Dumble/Fuchs ODS 50w with Eminence Cannabis Rex 12" speaker
Mad Professor Royal Blue Overdrive
Mad Professor Deep Blue Delay (slap back only)
Neunaber Wet Reverb
Fulltone SupaTrem tremolo pedal
Strymon El Capistan tape echo

Recorded with a Shure SM57 and a Shure SM7B