if I had a 4300 and was given a 6300 then the 4300 would be on its way to a secondary machine, the 6300 is a much better chip.
The last Intel machine I build myself was a Pentium III 450, at that time a wonderful chip, fast, cool and with a late era Biostar mainboard rock solid, the machine after that was an AMD Duron 700, I still have that one, later on I was able to get a Duron 750 and the 850, that last chip was my fastest Duron and i never went back to Intel, Athlon, Athlon 64x2 Phenom II and FX 8350, that last one is my gaming machine, desktop machine is a AM1 Athlon 5350.
I never looked for the fastest machine, always looked at what I could get for a fixed budget, intel never was able to offer me anything which outperformed the AMD chip of the same price, mainboards even worse, the game rig has a Asus Sabertooth which is a high end board, and the Intel board equivalent would have been 100 Euro more expensive...
Was the 8350 the fastest chip when I bought it? Nope, it wasn't, was it faster than my previous machine by a large enough margin? YES, was and is it still capable of doing everything I need it to do and then some? YES, its been running for three years now and it is still everything I want and need from a machine, the bragging rights are too expensive for me, I rather go for sanity and with the extra money buy a huge ass graphics card.