[boxhead]

As others are saying Mando, it will depend on why you want a hoist as to which one is best.
I dont like to use any hoist to "get extra storage" you just never know when your top car will develop an oil and brake fluid leak, if you need more storage, make more room.
4 post is great for ease of getting cars in the air, but a 2 post hoist has it hands down for doing work, especially when in the suspension, brake, wheel well, side pipe area.

Having the suspension hanging at full droop could I guess cause rubber suspension bushes to "crush" were they are under load, also rubber bushes that are vulcanised onto inner and outer steel part, they could tear the rubber away (this is why suspension bolts should be tightened when the suspension is in its normal operating position).