Apologies for my previous brief reply, was in a rush
Neither will demould in 30 mins for miniatures. You're probably looking around 40mins, to be honest. My recommendation is 305 in summer, 300 in winter. The ABL Stevens stuff is decent, but Smooth-On blows it out of the water as far a post-cure working properties go. Almost like a hard injection plastic where the ABLS stuff is more brittle.
I buy the big container from Smooth-On and decant it into 2x6 wide-mouth HDPE bottles I bought on eBay. This minimises the exposure to air. Even the 'working' bottles keep well as the surface exposed to air is small compared with the container in which it is supplied. The ABLS stuff seems to have a shorter open shelf life.
Smooth-On charge a premium anyway, but their trial packs are EXPENSIVE! At the larger size, the price becomes more reasonable, and certainly reflects the difference in quality.
Trial price/kg inc. delivery:
ABLS: £17.03 (2 kg)
S-O: £35.58 (.86 kg)
Decent size price/kg inc. delivery:
ABLS: £11.33 (10 kg)
S-O: £17.30 (7 kg)