TGWIF and STRATDELUXER highlight 2 variations of getting your tone. For Christian, it's all about the amp breakup, so a JTM45 would be too much. It would be very loud if used in that application.
John prefers a cleaner set amp as a base for tone colouring via pedals (incidently, the way I use my JTM45). Therefore he's able to set the amp at a lower volume setting, keeping things clean and dirtying up from his pedalboard.
I have tended to work from a clean platform over recent years, rather than the amps dirt, so my JTM45 has been perfect for me. A beautifully rounded clean tone, that I totally butcher with a Blackstar pedal and my club-fisted noodlings!