Pentium III was created in 1999.
There is no "Pentium R" processor. Knowing this, the biggest difference is that the Pentium III exists and the other does not.
The L1 cache in the Pentium III is SRAM.
The Intel Pentium III was released on February 26, 1999.
Yes.
No, you cannot.
As a whole, the Pentium 4 has a higher maximum performance than a Pentium III. The Pentium III performs the same as or better than Pentium 4 at the same clock speed, but the Pentium 4 has a higher max clock speed (which the Pentium 4 was designed for).
The AMD K6-III and early Athlon processors are roughly equivalent in speed and performance. Via C7 processors, although released much later, are close in terms of performance to a Pentium III.
They are no longer manufactured.
The Intel Pentium Dual-Core is much faster.
Pentium 4 with HT technology runs at the highest speed.
The Pentium III was a processor found in many computers, both desktop and laptop, in 1999 and early 2000s.
Pentium M was created in 2003.