They've offered me metronic 780g and that's tubed but I've had a tubed pump for a few years now, fancy a change and also my son keeps catching it and pulling it. Tubeless is better for me.
I can't comment on the two pumps you have been offered but I can comment on tubed vs tubeless as I have had both. Personally I prefer tubeless but there are downsides
- you have no choice of cannula. If the one that comes direct from the pump doesn't suit you, you can't try one made out of teflon or at a different angle or ....
- a larger area on your skin is attached to the pump. This may sound obvious but you need to consider if you are sensitive to the glue and how many sites you have that are the size of the whole pump rather than move the cannula a couple of inches over.
- the pump is in the same location for 3 days. Once in place you cannot move it if you keep knocking it with your bag or if it is just under the waistband of your favourite jeans that you planned to wear tonight or it is on your arm and someone has suggested a game of squash or if you placed it where you lie: it is there for 3 days.
- it is more expensive to change sets so your CCG may complain if you change the pump too often.
- you cannot temporarily disconnect the pump. I used to do this when I went in the sauna but now a sauna means a set change. I also used to disconnect when I went swimming whereas now my pump is on display in the pool
- I experienced more "obstruction" alerts (sorry, I can't remember the correct name), especially when I apply pressure to the pump. It doesn't like my skinny jeans.
Despite all of that, I much prefer being tubeless but it is not perfect