Millenium...
Is your Millenium a standard or plus or the funky p/j?
Please check your PM box.. have a private question (and no... nothing is wrong)
Foundation
Please remember this is JUST a personal opinion
I find it easier/faster do dial in sounds on a dual pickup bass.... need some bite? Roll on some bridge.. need some low end.. roll on some neck. It's my opinion that minute changes on a single pickup bass make more of a difference and compensate less than dual pickups.
The other notation (in the manual below) is that if you combine 2 ferrites on a foundation they become a fatter humbucker.
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Patriot
One of the guys I trade gear with (we swap expensive basses back and fourth for months at a time) will not send back his patriot. He's a more "aggressive" player he enjoys that he can dial in "Geddy or Squire tones"
When playing around with single pickup basses they do not all sound the same. Much of this has to do with where exactly the pickup is placed. A passive Musicman does not sound like a passive Pbass does not sound like a passive G&L (all the same concept designer)...
Smarter guys have taught me that this has to do with where along the string's harmmonic range the pickup is placed.
Overall Opinion 1 - Comfort and Band Mix
I have yet to own a quality bass that I couldn't dial in a useable tone. (That being said I don't believe a bass tone can be dialed in without a complete band spectrum mix from 30 feet).. my opinion is to find a comfortable neck (patriot and foundation necks had different profiles - even on the same model) and then spend a few minutes to find a useable tone that works with an amp (each bass and amp need to be mated to the strings, touch, room etc).
Overall, I find it faster to dial in a Foundation.. it's not a better bass, I'm just lazier.
Overall Opinion 2 - Pickguard
You may be a person who would enjoy a bass with a pickguard. This gives you the option to manipulate the bass.
Please don't be offended.. I have a hunch you would eventually modifiy any bass you have. A 2nd gereration Fury opens up your easier options to different pickups (standard pbass size pickups).. heck you may be an early HiA Bart customer (if you can find one)....with some barts you may be able to dial in your desired tone and eliminate the tone knob (Linc does this)
Please note neck profiles are very consistent, but did change within the models (normally at a generation)
I'd love to hear your opinion.
Tim
PS..

You'd hate my stable.. I have more knobs and switches than a russian submarine.. the bass I received friday has 2 barts, SIX kobs and a switch....Or worse yet.. a BQuad has 2 independent pickup systems..each string can be routed to either output jack --- funny huh
Now that being said.. I commonly gig a Milestone with tapes to keep things simple