Would it be insufficient if the 6d only has 11 focus points? Is the 39-point focusing of the d610 more convenient?

This is actually not important, it is just an auxiliary evaluation criterion.

The focus point of the 6D is 11 points. To be precise, the focus point of the D610 is 11 points extended to 39 points. The essence is the same. Many photographers are used to focusing first and then composing the shot. In this case, just use the middle point. As long as the middle point is correct, it's fine. If you want to shoot birds or follow moving objects, of course, the more focus points the better, but this is not the case most of the time.

It seems that the questioner is struggling with these two models, so I will say a few more words.

The price of the D610 and the 6D are now about the same, but the D610 is better in terms of configuration, and it also has an extra camera light. This light is better than not having it, and to be honest, it is still very useful for triggering flash. The reason why the 6D is priced at the same price as the more powerful D610 is because it has a built-in WIFI module. With or without this module, it is rarely used. At least I have never thought of using it at the moment.

Don’t worry about the lens group or anything like that. Nikon and Canon fans are trolling each other every day without any explanation. The loser here can win back. In short, there is no difference.

My personal suggestion is to buy the D610, which is better at the same price.