Awesome for you. I love when cyclists get into something new, yet the same. It's like comparing tennis to racquetball....similar yet totally different. Your Mootaineer will be as different from a track bike as a Ferrari to a Jeep. Good for you. I would imagine 'bob' is not a word in the language of track. Bob is not bad, bob is relative - good/bad, shock and fork set-up. Weight, pedal style and personal preference...I don't like bob myself. Any action up/down takes away from forward - but it's a trade off of comfort and efficiency. You can always get data for both fork/shock - I'm quite sure Moots has the geometry dialed in. And if your a track guy, your spin is smooth. I know (lots) of guys that if their bike isn't moving up/down 3" per pedal stroke, something is wrong. I get sea-sick looking at that.
But, that's the beauty of a full-suspension bike.
You, coming from a track background - I would love to see your face the first techincal section on a bike that has some action. I think in track, you control the bike - on a dualie, the bike's suspension allows you to have the bike control alot of what's going on - or what is going to happen. Awesome fun to learn a new riding 'thing'. Apples to oranges, yet both are good.
Go discs, no question, you'll have canti studs, and Moots doesn't shave them off any more than they re-do external to internal cable guides - it'll be killer.
Don't know your weight, riding style, but on a dualie - stiff everything (mostly wheels), let the bike work for you. You'll know 'bob' in about 2 minutes - adjust to your liking. Bob is your friend, adjust his habits.