"Topaz" puffers are generally the Ceylon puffer (Tetraodon fluvilitas). High-end BW -SW as adults. Grow to 7-8", require at least a 40g tank.
"Potato" puffer--not really sure what species that is. Maybe the T. miurus? Better find out 1st--maybe they could send you a pic & you can post here. Miurus is a FW puffer--extremely mean!