Depends upon your situation and what you want to do. If you elect OTP, you are pay protected for almost 3 months....but, month 3 you'll see a -CH. Bonus is you get preferential treatment on makeup requests and there is a bump in the CH as well.
Downside is you might make the decision on CRS plan, and then they revise the plan.....but, you don't get to change your mind.
In general, if my conflict is going to extend to the next day, electing OTP is going to pay better. If my conflict is on the last day, and it barely overlaps the trip (getting back at 0200 when I had an 0130 show-or it was an 8/24 problem) then I will generally go with rolling the dice and sticking with SUB. Important thing to remember with SUB is that I don't have to hang out at the airport, it's kind of like a mini reserve period.