In my opinion the Detolf would be fine for a dwarf hamster but it's very narrow so not great for a Syrian without being doubled up.Lack tables are just Ikea furniture,they're a side table of sorts and they're actually very cheap!They'd probably be better than a Detolf since you can do more with them due to the sides being able to be meshed,but there is always a double Detolf with a topper style lid.It would be way more expensive though and a lot bulkier than the Lack tables
A square meter cage is simply what it sounds like!It gives a square meter of floor space,which is species appropriate by actual scientific research unlike most minimums.Something like an 80 cm x 50 cm cage is not species appropriate though but is fine as temporary housing,while a 100 cm x 100 cm cage would actually be appropriate.Scientists have said that hamster needs can't really be fulfilled in captivity to the fullest extent and even said they shouldn't be kept as pets,but since they will most likely continue to be pets it is of course best to give at least a square meter cage if not even larger.These are animals which would travel miles at a time,so really even 100 cm x 100 cm isn't that great but it is still headed in the right direction overall.
Any form of chewing at the cage is a very good indicator of boredom!Something to remember is that even in tank style cages hamsters will often chew if the cage is too small,so don't just switch to a similar sized tank and assume that covers the problem since really the hamster will most likely chew the sealant anyways.