I'm a Jane fan so would plump for that combo.
I like the fact the Matrix seat can lie flat for a pram and also in the car to transport LO and then can be put more upright for a rear facing car seat also. No having to life LO in and out of the baby carrier and into a pram etc. And then can be used as an upright seat as baby is more able to sit upright. Then into buggy mode!
Plus its really easy to use. The orange buttons on it all do something, so there is no confusion over where are the controls. Its also got inflated tyres which make the ride smooth. And the wheels detach with a push of a button.
The Matrix seat is heavier than a normal baby carrier, but as it has a multitude of uses, for me it was worth the extra weight as I don't plan to carry it round like that much at all. Will have sling/pouch also if needed.
I looked at the Quinny range but felt they were too plastic-y and didn't feel as solid to me. Also didn't like the small wheels on them. They do have their good points of course, as lots of people like them and buy them
Just not my preference.
I think it really depends on your needs. We live very rural so wanted something robust, sturdy and solid. And easy to dismantle etc. Plus we loved the lie flat option for the car seat.
Make a pros and cons list and see which one wins out
Also have a look at the Jane website to see how they function.
Check the English option to then view the site properly They have a demo of it all somewhere also.