2 different sets of recommendations for service??

Aloha,
Along with the radiator and transmission replacement, I also need the 100,000 miles service. I got estimates for the 100k service from 2 Volvo mechanics. The price (expensive) is about the same for both mechanics ($688 and $760), but they don’t include the same services. I’m confused about which I need. I also wonder if there are any I can do without (It’s going on credit). Is it wise to change the tensioner and crankshaft pulley (the two parts are $258)? You folks are great that you can do your own mechanical work!

Mechanic J:
Injector cleaning solvent
Fuel filter and seals

Flame trap plastic, nipple, vacuum hose
timing belt and seals
timing belt pulley

Mechanic M:
timing belt and seals
pulley, crank d
tensioner, timi

MOA oil additive
fan belt (2)
service pcv system and throttle body (optional, but recommended)

Whichever mechanic I choose, I'm not getting some recommended service done. I read from your faq about the timing belt needing to be changed, but what about those other parts? THANK YOU for any replies.