iPhone 5c getting replaced at my carrier.

I got a iPhone 5c at Telus(I live in Canada so don't know if anywhere else has it) and I've had it for a year then I was barely getting service and it was always making me reactivate my phone and I wasn't receiving pictures. I have Apple Care so it would've only cost 50$ to get a new phone but it's covered under warranty. I have a pink iPhone 5c 16GB! Now in any store you can only get a 8GB. My new phone will arrive in 3-5 business days because I guess they get it from a manufacturer! Should I still get a new 16Gb phone since that was what I had?