Personally, in terms of style, I prefer Ramo to Hiller. He's more acrobatic in his movements, especially laterally, and we saw in the last several games that Hiller let in some goals that would require strong lateral movements - not that he should've saved those goals, but at the time I had thoughts like 'what if Ramo was in net?' Like the win Ramo had against the Sharks, I thought that was arguably the best game Ramo had for the Flames. Just my preference in prototypical Finnish goalies like Kipper who play a finesse butterfly style. It's just unfortunate Ramo wasn't able to perform consistently because I think he has the abilities to post the level of SV% and GAA Hiller is producing at the moment.
However, with all things like style, contract situations, and value aside, there is no doubt Hiller has been better in stopping pucks than Ramo this season. So really I would not have a problem if Hiller is kept over Ramo, or even vise-versa.