I am enjoying the new shuttles. They are light in weigh and seem to be a bit narrow then the Clovers. I say them compare. But they may hold a bit more thread. To begin the TIAS it was said to fill 2 shuttles. I measure (give a take) 10 yards on each. With the Sunlit I still had a bit more space.
It's not too late to jump in one the fun. Just go to: ladyshuttlemaker's blog and you can find all the past days here.