Hi
@Suffolklad and welcome
Personally I don’t think I’d be able to stick to one of those diets - they’re low in carbs only because they’re very low in calories and that’d leave me hungry, which in turn would make it a constant battle with willpower.
That may be less of an issue for you, in which case, yes, you may shed some weight quickly. However I’d urge you to weigh up the following first:
1) The single most important thing with type 2 is managing your blood glucose. Getting that in check wins over weight loss every time.
2) There’s no ‘quick fix’ for type 2. You’ll need to find a way of eating that you can sustain for life and which keeps your blood glucose within range. If you go down the ‘crash diet’ route, you’ll need to give careful thought to what comes next. That’ll likely be a low carb way of eating. I’d suggest starting with that, getting your blood glucose under control and learning which foods are ‘safe’ for you would be far more sustainable. And weight loss very often follows, sometimes rapidly.
3) Eating, fresh, ‘real’ low carb foods would be far more satiating and easier to sustain than pretty processed, meal replacements. Likely a lot more cost effective too.