Force Choke is currently trending as one of the top Legendaries in the set, and I wanted to go ahead an run down a comparison between it and a card I'm particularly fond of: Immobilize. Ultimately, I feel like Immobilize does the job a bit better overall, although the decks that want one will usually want a pair of each anyway. Still, this kind of thinking can be useful in assessing mulligans and early plays, so I feel the distinction is still valuable.
I'm looking at these cards specifically through the lens of a primarily blue control deck; if you're looking to run a blue villain aggro deck I strongly recommend eVader + Tusken Raider, and your 2-cost upgrades should be cards like Gaffi Stick and Jetpack, which add a lot more damage to the board than either of these controlling options.
The two cards have a lot in common right off the bat: they both cost 2 resources, can only attach to blue characters, are ability upgrades (eligible for Sith Holocron), and they both adjust dice instead of removing them outright (which is strictly worse).
Immobilize:
- Can use its control effect regardless of its own result (Huge)
- Can target any opposing dice in play, including support dice (Doesn't always come up, but very relevant when it does)
- Cannot target any dice with 0 blank faces (Rarely comes up, but usually very bad news when it does)
- Must activate alone (separately from Special results and other Immobilize actions; not usually relevant but can be a hindrance)
Force Choke:
- Requires you to roll one of 2 Special results (Huge)
- Can only target character and upgrade dice, not supports (Usually not relevant, but can be very bad when it does)
- Can target dice with no blanks and still change their best effect to their worst (Rarely comes up, but very useful when it does)
- Deals an unblockable damage when it resolves (Mostly negligible, but still upside)
- Can target your own characters as a proxy Use the Force (Very rarely comes up, but probably game-winning/changing when it does)
At the end of the day, I feel that the ability to use Immobilize's control effect even when you roll blanks outweighs Force Choke's techy advantages over it. I feel that most of the other relevant differences are negligible compared to the consistency on Immobilize. Still, Force Choke has some niche advantages over it that can be crucial when they do come up, so it's not like it's just a strictly worse card overall. I really enjoy this distinction between Rare and Legendary versions of the same effect; the rare is more bluntly powerful, but the legendary has more interesting applications that can really blow a game open when the opportunity comes up.