Robo hamster pros :
*If you want an energetic pet they are great to watch running around in a nice big cage
*They have a very unique body shape and they are cute / attractive
*They are the smallest so they do less toilet business everywhere which means a cleaner cage
*They are less expensive than Syrians as they need smaller toys , wheel etc..
*They have very funny personalities
*They are able to live in (even) groups
*Aren't prone to diabetes like dwarves (then again Syrians aren't either )
Robo hamster cons :
*Unless you get them from a private breeder where they are handled from an early age , it's quite hard to tame them & they are actually never 100% tame -i.e. just let you pick them up , they are really just for watching .
*Because of their extreme energy ( running up to 20 miles per night in the wild )
they need lots of space and they will appreciate as much floor space you can possibly give them . They can even develop repetitive behaviour from living in a cramped environment .
*As they are very small they need bar spacing to be no more than 7 mm
*HUGE escape artists
*Come in less colours and patterns
Syrian hamster pros :
*Syrians live alone so there is no need to buy him/her a pair (unlike guinea pigs who get lonely without company )
*They are the biggest of all domestic hamsters so they are a bit easier to find if they escape for their cage or your hands
*Syrians are generally very tame and friendly and will probably like some occasional interaction with people . However some Syrians are aggressive and will not like human interaction which we can't change .
*You are less likely to find an aggressive Syrian than an aggressive Robo (that's actually a matter of opinion
)
*If tamed it will allow you to stroke or hold it for a while .
*If tamed it is very friendly and will get very exited when it senses your presence.
*Aren't prone to diabetes
Syrian hamster cons :
*They are more active during the evening and they are VERY noisy (atleast mine is
)
*Usually not suitable in a house with young children
*Prone to wet-tail (an illness caused by stress )
*Pricier than Robos
*Females can get quite smelly when they are in heat
I would probably recommend a Syrian if you are a first time owner but if Robos appeal more to you then go for it ! Hope this helped & Happy New Year
P.S sorry this was so long