Hey and welcome! You're right about the difference. You do invest into your main pet though - you slowly build up their collections, and even better, you can collect all the colours in their closet. Then you can change its skin any time you want, to any colour you want! I hope you find the collecting aspects fun enough to stick around ^^
Here is the node, you who hate change and fear revolution. Keep these two squatting men apart; make them hate, fear, suspect each other. Here is the anlage of the thing you fear. This is the zygote. For here "I have lost my land" is changed; a cell is split and from its splitting grows the thing you hate—"We lost our land." The danger is here, for two men are not as lonely and perplexed as one. And from this first "we" there grows a still more dangerous thing: "I have a little food" plus "I have none." If from this problem the sum is "We have a little food," the thing is on its way, the movement has direction.