cambay hydrocarbon assessment, page-2

Adding together the figures for the discovered and undiscovered:

Hydrocarbons in place
Low: 2,624 BCF, 2,479 MMbo
Best: 6,281 BCF, 5,950 MMbo
High: 11,463 BCF, 12,156 MMbo

Unrisked Resources
Low: 196 BCF, 30 MMbo
Best: 642 BCF, 100 MMbo
High: 2,116 BFC, 326 MMbo

Now if we compare that to what was in the August investor presentation:

Reserves justified for development:
P90: 248 BCF, 11 MMbo
P50: 384 BCF, 17 MMbo
P10: 591 BCF, 27 MMbo

Contingent Resources
P90: 186 BCF, 8 MMbo
P50: 324 BCF, 14 MMbo
P10: 568 BCF, 26 MMbo

I am not up to speed with the industry jargon and standards and to me it looks like these were undertaken using different classifications. Can someone answer the following:
1. Are hydrocarbons in place and reserves justified for development the same (or similar)?
2. Are the P90, P50, and P10 estimates comparable to the low, best, and high estimates?

If the answer to both those questions are yes then the resources have just been confirmed and de-risked at the low end and upgraded by a factor of 4 at the high end. And the reserves have gone up by a factor of 10 - 20.