As about the second link, I too don't believe in it. But as far as the first link is concerned, let me make it more easy for you as it seems that you had not read it properly.
DRDO 125mm Mk-2
Indian Army Designation - Not Known
When the DRDO Mk-1 125mm round went into production in 1997, it was already working on Mk-2 version of the round. This it was doing without any GSQR for such a product. With TOT for 125mm round leading to suspension of production of DRDO Mk-1/AMK-340, IA was not interested in DRDO Mk-2 round.
However, DRDO persisted with the development and when ground was literally pulled from below the feet of Army due to IMI blacklisting; this became the only recourse available.
The CAG Report No.24 of 2011-12 (Defense Services) explains the development of DRDO Mk-2 round:
“Ministry of Defence, Department of Defence Research and Development (DDRD) in May 1996 sanctioned the above project at a cost of INR 2.30 crore to be completed by May 1998. It was sanctioned by DRDO without GSQR from Army HQ. The project after four revisions of probable date of completion (PDC) and three cost revisions, was closed in December 2004 after an expenditure INR 7.27 crore. The ammunition developed by the Laboratory did not meet the Users’ requirement as Users expressed an apprehension as to whether the trials conducted for MK-II ammunition in the absence of GSQR for this ammunition would qualify as user trials. To resolve the issue, the ammunition was subjected to Accelerated User Cum Reliability Trials (AUCRT) in August 2007 which again proved to be unsatisfactory. Ministry of Defence in its reply in February 2011 stated that trials with 30 rounds of improved ammunition, have been successfully completed in May 2010 and Army HQ has given go ahead for accelerated user trials with 500 rounds of the improved ammunition. Ministry’s reply should be viewed in the background of the fact that even after a lapse of 15 years the ammunition is yet to be inducted. Such ammunition is still being imported by Army.”
This ammunition is expected to go into production in 2015.
Source: http://trishul-trident.blogspot.in/
One measure of technological progress made by DRDO in development of 125mm APFSDS is the comparison of L
Ratio of DRDO MK-1 and MK-2 round – this parameter was 14:1 for earlier round while the L
Ratio of Mk-2 is 20:1.The picture above shows the comparative parameters for the Mk-1 and Mk-2 125mm rounds.
DRDO 120mm Mk-T-2
DRDO has also developed the Mk-2 version of its earlier 120mm round for Arjun tank.