Tijuana is in 1st place and at home. Pachuca was lucky to tie Montreal Impact in the 1st leg of the CONCACAF title but they still gave 2 away goals. My thought is that Pachuca will look ahead to the Montreal match in 3-4 days and won't care as much about their match with TJ.
One concern is that this is TJ's 5th match in 14 days compared to 4th for Pachuca in 14 days. Wow. Even if they rotate reserves in their cup that's a lot.
Composite, I jumped on Tijuana earlier, for the same reasons you mentioned. I wasn't aware of the heavy work load, but more importantly, they are at home tonight.
BOL
They've played a lot due to Primera and Copa Mexico games. Since 1/24 TJ has played 9 matches. By comparison Pachuca played 6. I'll pass. GL though Franz.