We booked the Spanish-language tour of the underground and Belvedere, but for the sake of my non-Spanish-speaking husband and kids, I was going to also book the 5 Euro guided tour in case he felt like he wanted more info. (And for 5 Euro, we won't feel bad skipping it if we're Colosseum-ed out by then.)
The Spanish combo tour is at 10:45 a.m. and is 90 minutes long. There are English guided tours available at 12:15 (exactly 90 minutes later) or at 1:30 (leaving a 75-minute gap). Would you call it close timing-wise, or go with the huge gap? Thanks!