Should I keep the Nokia Lumia 620 or should i get the new Nokia Lumia 630?

I currently have a Nokia Lumia 620 and I LOVE IT! The way it feels in my hand is amazing and I'm able to type and hold the phone all with one hand. The screen is clear and bright unlike my old 520. I also love the front facing camera.
Now if you know nokia lumias you know that a very common problem is that the charger port will break making it almost impossible to charge. I went online and found that replacing the charger port yourself is easy and cheap (around $10). My boyfriend is a tech and knows how to do this very well. When I approached him about it he offered to just buy me the new nokia lumia 630. I did some research and as far as i can tell the only great thing about it is that it has a quad core processor. And maybe the gorilla glass screen. I want to know of the Nokia Lumia 630 is worth losing the front facing camera, phone shape and the many other things i love about the Nokia Lumia 620?

BTW i'm a windows phone developer so i already have the 8.1 update with cortana so that is not a deciding factor at all.

*Please don't tell me to get an android or Iphone. That is not what i asked, and i can tell you why: I don't like Iphone because they are not secure (a fifth grader can hack that ****) they are expensive and glitchy. Android is okay but i like the Windows interface it works well with my ocd lol. Everything is neat and tidy*

Considering your occupation, the front facing camera isn't a big deal anyway, I'm sure you won't miss it that much.Now, spec wise, the 630 is obviously slightly improved and if you can get some money back for the 620 I recommend you make the upgrade as the 4.5 screen is noticeably bigger and you get a quad-core instead of a dual core, as well as some other tiny changes.Overall, it is an improvement, if you can get it for less money (thus selling your old phone) , don't hesitate.

The Lumia 630 lacks a front camera and it doesn't have flash, unlike the 620. But the 630 has a quad core processor unlike the 620 which only has a dual core processor, so yeah. A difficult choice. Personally I would choose the 620 just because of the front camera, the flash and the size. I just get this… Special feeling when I hold it in my hand.