I have just tested both versions and I wondering why they are giving
diffrent readings about same mpeg-file?

Version of software is v1.05.54

File's details:
Num. of picture read: 20625
Stream type: MPEG-2 MP@ML VBR
Resolution: 480*576
Aspect ratio: 16:9 Generic
Framerate: 25.00
Nom. bitrate: 2600000 Bit/Sec
VBV buffer size: 64
Constrained param. flag: No
Chroma format: 4:2:0
DCT precision: 10
Pic. structure: Frame
Field topfirst: No
DCT type: Field
Quantscale: Nonlinear
Scan type: Alternate
Frame type: Interlaced
Scene change detection: FOUND
Variable GOP pattern: FOUND

Commercial settings: parse 0n, calculations on 1000.

Freeware reports: Commercial:
peak average peak average
bitrate 2933 2450 bitrate 2628 2031
q-level 25.49 8.86 q-level 25.49 7.80

Why?

Makers of sowtware don't even have they e-mail address working...