I've used Garden Grocer several times and have not used wegoshop. Like others have mentioned, I like being able to set up my order online and know the cost right away, and I like the lower delivery cost. GG does offer weekly specials and e coupons on their site.
With GG you *can* order items that do not appear on their website by placing the request in the comments section. This includes beer, wine and liquor.
I find GG is also very responsive to requests. One time, the day before our arrival, I noticed that I had forgotten one item in our order(OJ). I emailed them, they replied very quickly, and they added it without any problems. I could have either paid for it by Pay Pal or paid the delivery person (I opted for PayPal since I'm never certain we will be there for the delivery person). GG will deliver to your room if you are there, otherwise they leave the order with Bell Services. I have usually selected a delivery window that ends up being a bit earlier than when we get into our villa so have no direct experience with having them deliver directly to us.
I have experienced a couple of times where Bell Services was unable to find our grocery order in their storage - both times it was past the time GG was supposed to deliver. After calling GG (left a VM) they called back very quickly with the exact time they delivered and the shelf numbers (regular and cold storage) where our order was stored. Called Bell Services back with this info and PRESTO!
our groceries were found.
Overall I have been extremely pleased with both the quality of the GG service and the items delivered (for example, bananas were perfect and free of blemishes) and highly recommend their service.