SST sounds like the better deal, add about $30 if you want to run it fixed. To convert the Lager's brakes to TT levers you're looking at $40+ if you do it yourself ($30 for the levers, $5 new cable, $5 new housing, add $10 if the bar tape can't be reused). Probably more if the shop does it since the tape will need to be rewrapped.
The Lager looks better aesthetically IMO but beyond the paint and the brake lever placement the two bikes are nearly identical. Lager has a 1cm longer top tube for the same size frame but the other angles are all the same so the should handle pretty similar.
Xkill summed it up pretty well. If the shop service is important to you get the Lager. If you're comfortable with the DIY then the SST sounds like the bike for you.