Dublin ratios

I'm on the fence really, when I got my first fixed a few years ago it was a Paddy Wagon straight off the shelf, I knew nothing about chain wheel sizes or cogs really, it was a 42-16, I rode it with a front break. I think they're fine for learning or around town, mind you, slightly siding with Scary here- I rode my Beater conversion earlier, I hadn't been on it for a while and I'd been too lazy to change it over from 42, fuckin will now though, rode home on the N11 from stillorgan to town, going downhill brakeless on this was scary, felt quite out of control with no breaks to be honest, the spare 46 ring i have's going on tomorrow

Maybe just stick a front brake on instead and have some fun going downhill? If you change the ring will you then have 2 brakeless fixed wheel bikes ... with the same gearing on each?