I love onion rings but sadly no matter where I order them in just the past couple of years they always give me killer heartburn......not a fan of tater tots or heartburn so I voted for fries.
Onion rings, not the tempura battered, or beer battered. I grew up bowling and working at Yale Bowl in Tulsa, they had the best. Webers rings are very close, and the rings at Mahogany are damn near it.
I've never had BAD tater tots at a restaurant but quite a few places sell bad onion rings which skewed my vote.
So if they're both GOOD ones, I would say onion rings but it's always a gamble you're gonna get something barely better than Funions...so my vote goes tots.