I have a choice between a 1.5 or 6 hour layover in YYZ, where I'll have SS access. The 1.5 hour layover has me on a 789 inbound from LAX, which is nice but the flight is frequently delayed to the point where I may have to skip the SS altogether. (To add: I'd be connecting onto the 9:35pm YYZ-FRA, not sure how crowded the SS gets in the 7:30-9pm window.) The 6 hour layover has me on a 7M8 inbound, which should give me plenty of time for the SS, but maybe too much time and obviously on an inferior aircraft on the LAX-YYZ leg.

Which layover would you pick in my situation?