Yes and no respectively

The blue bosch tools are from the professional line. The green ones are the "hobby"/homeowner ones. Batteries and chargers are not directly compatible between the two lines, Which is a dick move in my opnion. But the "green" batteries are compatible with products from Gardena and some other garden equipment manufacturers.

Blue bosch tools are very good quality but generally too expensive compared to their competitors, in my opinion. The green ones are alright but you could just as well buy some Einhell or Metabo tools then. They are alright as well and a bit cheaper from my experience.

I sugggest you to check out Torque Test Channel on youtube. They do a lot of testing and they have hard numbers to prove if one tool is better than another. They have tested Bosch ProFactor tools as well.

Edit: and they refuse any sponsor out of integrity. They buy and test all of the tools.

Depending on what you use your tools for, you don't need all your tools to be top gear. I personally have a mix of Makita, pro Bosch (aka "dark blue" Bosch) and "diy" aka "green" Bosch. For me, a jigsaw doesn't have to be hardcore, a green Bosch makes do. For a router, I chose the heavy weight Makita. The tool I use the most, the screwy was a gift for which I didn't have a say. I ended up with a 12V green Bosch from the bargain bin. Still kicking 6 years on, turned out the batteries are the same on the Dremel line, unexpected combo. The tool took some abuse and impressed me on how good it is. I learned from it that a light tool is a better tool, and that it can then be faster than the big brother 18V from how easier it is to "aim".

For the tools I use once or up to few times a year, I often go the the cheap options, avoiding knock-offs though.

I use most tools with a cord, so I tend to compare specs and prices and choose from brands I pledge (i.e. the three mentioned above). The thinking is very different if you need a battery comprehensive tool line "It's quite expensive to marry twice at the same time".