as I have mentioned I chose the top manueli but assuming that the one in the bottom does not have a bump on the chin the bottom one would actually also look nice once it reaches 6" onwards. if you noticed the bottom manny it's tail is facing downwards. my personal experience some adult P's that have their tail pointing downwards looks more aggressive. so if you have the chance or means to purchase both then do it. setup 2 40 gallon breeders for now to house them temporarily and see with looks better months from now. throw in an emperor 400 on each of the 40 breeder and you'll have a happy and healthy manny. eventually they will need bigger tanks but for now this will do. don't worry about the other one being thinner bec you can always nurse that back into a healthier P since its a solitary fish so you'll have all the time to care for it. if it's not eating starve it for a week and I guarantee you it'll have a big appetite after that assuming your water parameters are perfect.