Sea to Summit Pillow Comparison

Hi Everyone.

I'm a restless side-sleeper who has been in the market for a pillow for quite some time since none have seemed both comfortable and light. I recently learned of the Sea to Summit Aeros Pillow. There is a "Premium" version and an "Ultralight" version. Seems these pillows are designed to compete with Exped's pillows.

http://www.rei.com/product/866771/sea-to-summit-aeros-pillow-premium/?cm_mmc=cse_PLA-_-pla-_-8667710001&mr:trackingCode=ED88BE54-87C2-E311-90E9-BC305BF82162&mr:referralID=NA&mr:device=c&mr:adType=pla&mr:ad=52774014640&mr:keyword=&mr:match=&mr:filter=70659397480&msid=prVgVqvN_dc|pcrid|52774014640|

http://www.rei.com/product/866772/sea-to-summit-aeros-ultralight-pillow?partner=cse_PLA&mr:trackingCode=EF88BE54-87C2-E311-90E9-BC305BF82162&mr:referralID=NA

While I recognize that this is a subjective issue, can anyone comment on how comfortable the premium is compared to the Ultralight?

Thank you!

Rhz.