A creative soul with an inquisitive mind. Music/Art/Organic Gardening/Gaming. Web 3 explorer. Always seeking knowledge.  Build something beautiful!

I think it's down to your own prefs: we maintain price parity across both chains. 

Gas fees are much cheaper on Polygon, so if it's not a huge amount or multiple buys, you'd probably get better overall value on Polygon as the tx fees wouldn't be as high.

A great questison from @tanwenbrantley about whether it's better to buy $NOVA on Ethereum on Polygon, answered by our in-house catto @arfonzo:

Nerding, plants & humble servant of cats. 🐈 | Operations Lead, Community Lead & Council Member at Nova DAO @novadao /nova | /allotment /cli /foss /vaping

Nova DAO: an Ethereum-based autonomous community, with GameFi & DeFi Development backed by Studio Nova.

I chose polygon cause of the gas fees of ethereum