Sorry if this is posted elsewhere, but I couldn't find it after searching...

I am looking to fly LON-KEF-SEA on Icelandair. I can fly out of either LHR or LGW at almost the exact same time and LHR is only a few pounds more.

Any suggestions? Is the Icelandair terminal at one airport better than the other? Lounges? I'll be flying economy so not sure that will even matter.

Thoughts? THANKS!