What is the different of Arduino as ISP and AVRISP?

[Porama6400]

If i want to program Atmel microcontroller from Atmel Studio

Should I buy actual AVRISP or Arduino as ISP is enough?
And how is it different?

[Rithers]

If you already have an Arduino, give 'er a try as an ISP.   Arduinos are nice in that they have built-in power and serial adapter,
however it might not provide the same "plug & play" ISP functionality as a device which is fully supported in Atmel Studio.
(Maybe Arduino's AVRISP is supported in Studio 7 by now, im not sure...)
You might end up having to copy some AVRdude commands from Arduino's verbose output window into AtmelStudio's external tool UI.

At the very least, you'll learn some fun stuff. 

-If you havent yet seen it,  this book is really amazing (I call it my AVR bible):
AVR Programming"learning to Write Software For Hardware"
Elliot Williams

http://shop.oreilly.com/product/0636920028161.do

https://www.amazon.com/AVR-Programming-Learning-Software-Hardware/dp/1449355781

takes you through real basics like flashing an AVR from your command line terminal onward through some very interesting in-depth projects


happy Flashing
/rithers

[dannyf]

If i want to program Atmel microcontroller from Atmel Studio

depending on what you meant by "program":

1. if you want to burn code into AVRs from within AS, get a programmer that's supported by AS;
2. if you want to burn code compiled from within AS, get a programmer to your liking.

Should I buy actual AVRISP or Arduino as ISP is enough?

depends on what you have. I used the dragon and now I'm using mostly usbasp: fast, robust, small and cheap. But if you have an arduino already and are tight on money, a programmer that reuses your arduino makes perfect sense.