The success of a seamer lies in both the chucks themselves and the can blanks and lids. If the chucks are made to the correct profile with good close tolerances, and the can blanks and lids are also the right profile, then it should be fine. If you're not running at somewhat fast speeds where dynamic balancing issues start to cause vibrations and all that crap.
Assuming we're talking simple manual, single-head machines like in the OP. I would most certainly not have the faith in the emerging Chinese manufacturers to produce automated, multihead seamers of decent reliability just yet.