I just bought and installed a Terrova on my boat a couple of weeks ago. Here are the notes that I kept for myself that I compiled off of Minn Kota's website. The prices are for the 80lb model.
PowerDrive - $1,250
70lbs, 60" only.
Just i-Pilot (no Link)
Deploy-assist lever
Universal sonar is another $100
Terrova - $1,700
80lbs
112lbs is another $300
Lift Assist
Spot-Lock with jog
i-Pilot Link is another $660
60" shaft is another $50
iMarine USA has it for $1,700, free ground shipping. $30 for next day
Ulterra - $2,179
80lbs
112lbs is another $250
Auto stow & deploy
Power trim
Spot-Lock with jog
60" shaft is another $20
i-Pilot Link is $360 over i-Pilot
Ultrex - $2,200
80lbs
112 is another $100
Power steering (less effort)
Lift Assist
Spot-Lock with jog
i-Pilot link is another $400
52" shaft is another $50
60" shaft is another $100
https://www.minnkotamotors.com/Trolling-Motors/Freshwater-Bow-Mount/Product-Family/Shop-All/ Minn Kota Freshwater Trolling Motors