the joovys are actually designed by a guy who used to work for babytrend.
I think the mia modas are sleek looking, but Joovy definitely has the edge when it comes to sit and stands.
babytrend... eh... they haven't done anything remarkable with it like mia moda or Joovy.
mia moda's is just as heavy as the regular Joovy Caboose or the Sit and Stand, but with sleeker lines, a comfort pad for the standing child if they lean back on the hard parent tray (one thing I always worried with on babytrend models that have the parent tray... an injured head or back), a one touch break that locks both rear wheels at the same time, and a slightly deeper seat for the sit part of sit and stand.
It takes more than just the mia moda seat, which I think is essential and very good on their part.
For me, though, weight would be an issue, which is why, until very recently, I would only recommend the Joovy Ultralight Caboose. It offered the biggest canopy and the first to offer any shade for the rear rider when sitting and some AWESOME fabric options, too, which helped.
However, my new favorite, while 9lbs heavier (the ultralight is a mere 21lbs... same weight as a Maclaren Twin Triumph/Rally Twin and this new one is 30lbs like the original caboose, Mia Moda Compagno, and Baby Trend Sit 'n' Stand) has to be the Ergo Caboose
http://joovy.com/pages/pd_ergo.php
If you have to have that much space for the extra rider and also want to utilize it as a single stroller when shopping like some parents do with their big tandems (graco duo glider, etc.), then this is the one to have because they made the bench seat able to be flipped up to access the basket... you could do some SERIOUS shopping with this thing, as long as you don't put little things where they can fall through the bars on the side that will keep things that go higher than the basket contained. It also makes toting a diaper bag with this stroller (without the purchase of stroller hooks) or some shopping bags (if you have a skip hop bag that can clip to the bar handle), even if you have two passengers.
But all that is nothing compared to the new canopy, which completely shades both children when both are seated.
And if that weren't enough, they finally did what everyone who has loved these type strollers dreamed, they made it so you can attach the carseat on the REAR, so your older child can have the regular stroller seat until the baby is out of the carseat (and with a Peg Viaggio SIP 30/30, as shown on the website, a Keyfit 30, SS1/snugride 32 or other 30-35lb infant seat, that could last awhile... heck, as long as the baby fit comfortably, you could keep the infant seat in the trunk/storage after you moved baby to a convertible seat and have a double seat stroller until you're really ready to move to letting the older child use the platform seat or stand (aka... till the kid won't be going... MOMMY... I'm tired... and wanting to nap in it) The rear half of the shade has a cutout so it does not get in the way if the child wants to stand... letting you keep it on all the time
The stroller has a more contoured seat (resembles the one on the bugaboo bee), giving more sleep support for sleepy children and also providing ergonomic support for sitting kids.
The cost is higher and it weighs more, but again, I think it's worth it over the caboose light, unless you have no need for all these extra features.
So I'd at least narrow it down to the ultralight caboose or the ergo caboose.
Now, one other deciding factor may be your ability to wait, as it is only preordering now..... but it's less than a month till release.