I can say I have a bit of experience with multi tools, currently having 16 Leatherman, 12 Gerbers, 8 SOGs, and 3 Victorinox (plus 18 SAKs) and having had many others.
The best criteria to decide what MT is best for you is decide
your most used tools and implements. Some people need pliers frequently, others use scissors on a daily basis, many people don't like MT blades because they carry a OHO knife or specialised blade of sorts with better steel, geometry and ergonomics, etc. (that's what Spydies are for

)
For drivers, scissors and pry tools, a
SAK will suffice most times.
For pliers, locking drivers, good blades (SE and PE), great files, and other gizmos a
MT might be the best choice, though generally more expensive, heavy and big than most or all SAKs.
Nowadays I still consider the Victorinox Spirit, SOG PowerPlier and Leatherman Rebar the best
mid sized tools in the market, easy to use, tough, and easy to carry.
Runner ups would be the SOG PocketPowerPlier, LM Wingman and Gerber MP600, not as good but generally cheaper and tough enough
Next up would be the LM Wave, Gerber Diesel and SOG PowerAccess, for the
mid-large size
and on the
large category, the LM ST300 and Surge, the Vic Swisstool, the SOG Powerlock and the Gerber Center Drive, Gerber MP800
for small, simple ones the SOG Powerpint, Leatherman Skeletool and Gerber MP700 are my favorites
for mini sized ones, LM Micra and Squirt are king, SAKs like te Classic, Rambler or Minichamp are excellent but lack pliers, and the Gerber Dime has crappy QC and durability
if you need locking pliers in a Multitool I'd search for a Leatherman Crunch, Schrade Vise Grips (3 models) and the old and rare Kershaw A100
SOG has (to me) the best pliers, Victorinox the best versatility, LM the best toughness and Gerber the best balance of price and quality, but if you need a
particular feature or tool then you are looking at a
particular model

Hard to go wrong with any SAK, though
Unique features:
Compound Leverage: most SOG
OHO Pliers: SOG; Gerber, one model from Leatherman
OHO Blades: some Leatherman, some SOG, some Gerbers, one Kershaw
Diamond Files: Leatherman
Outside accessible scissors: Gerber, Leatherman, Victorinox
Bit Driver: Leatherman, some SOG and few Gerber
Pocket Clip: some SOG, some Leatherman, few Gerbers
Locking Pliers: one Leatherman, three Schrade, one Kershaw (don't even think about the Gerber Grappler

)
and then there's price ranges:
my picks,
$0-30: LM Squirt, LM Micra, Vic Classic and Rambler, Vic Spartan, Vic Tinker, Vic Climber, LM WIngman
$30-50: SOG PPP, Gerber MP400 and MP600, Gerber Diesel, Vic Explorer and Huntsman, LM Rebar, LM Skeletool, SOG Powerpint, Vic OH Trekker and Soldier, Gerber Diesel, Vic Alox of sorts
$50-80: LM ST300, LM Wave, SOG Powerlock, SOG PowerPlier, LM Crunch, Vic Swisschamp
$80-120: LM Surge, LM Charge, Kershaw A100, Schrade Vise Grips (ST6, 5WR)
warranty shouldn't be an issue with those 4 brands, but there's also options for very budget prices (OUTU; Ganzo, Rcharlance, Roxon...
my all time favorite multitools, and my all time favorite folders and glasses from the last 15 years

:
lacking in the pic is the SOG PP and PPP that were on my belt
