here is comparison bw mig29SMT & Mirage 4000 although MIG29ovt<f16 blk52 & Mirage4000>mirage2000H so i guess F16 blk50+ is better than modified IAF mirage2000H
So how does the Mirage 4000 compare to the Mig-29OVT as an air-air fighter?
Performance
Although the two aircraft are of similar size, the M4000 is far heavier and more powerful, generally being considered analogous to the F-15 Eagle whereas the Mig is generally regarded as more akin to theF-18 Hornet; a middleweight fighter. However, the Mig has a significantly better thrust to weight ratio (at combat weight), giving it better acceleration. But the Mirage's compound-delta configuration gives it lower high-speed drag which coupled with its substantially more powerful engines allows it to match the Mig's impressive maximum speed and actually out climb the lighter Mig. Where the M4000 is weakest, and the Mig strongest, is in low speed maneuvering. Although the compound delta (the small fixed canard in front of the wing) is likely to give the M4000 better slow speed characteristics than conventional delta aircraft, there is no way it could outperform the Mig with its conventional wing layout, positive thrust-weight ratio and thrust vectoring control. The Mig's agility advantage would be massive.
Beyond visual range combat
The Mig is likely to carry four AA-12 Adder medium range missiles under the wings. It could conceivably carry six, but this would adversely affect performance and is generally less likely. The Mirage had 11 stores stations, but in a revised layout akin to the more recent Mirage 2000-5, it is likely to carry 4 MICA-EM missiles under the fuselage. This allows up to three drop tanks (extra fuel) to be carried for extended CAP.
If we assume that the Mirage would be fitted with the Thales RDC-2 radar set, consistent with the latest Mirage 2000-5 (rather than the more advanced system carried by the Rafale), and that the Mig carries the Zhuk-M/ME, we can attempt a basic comparison.
The Mirage's RDC-2 set can detect fighter sized targets at a range of about 140km, noticeably better than the Zhuk'M's estimated 120km (i.e in a head on engagement where both aircraft are traveling at 1000mph and at the same altitude, that equates to a 22.5 second advantage). Where the Zhuk-M outperforms the RDC-2 is in it's ability to simultaneously track 10 targets, engaging four, whilst the RDC-2 can only track 8, again engaging 4. Which is superior in terms of target discretion, jamming resistance etc is hard to say, but the reputation of the French unit makes it the better bet.
There is no way of conducting an accurate comparison of the AA-12 Adder and MICA-EM in the public setting. But we can make some educated guesses; the MICA is likely to be marginally shorter ranged, but more agile with a slightly superior seeker. But that does not detract from the AA-12's own impressive agility and range. In practical terms the two systems are probably about equal, with the scales tipping in the MICA's favour when fire control systems are considered.
Within visual range combat
This is definitely the arena of the Mig. With super-agility and integrated radar and IR targeting sensors, it has a distinct edge over the comparatively straight-line Mirage.
The Mig's AA-11 Archer short range missile is also significantly better than the Mirage's Magic2 missiles, although its MICA-EMs are also capable a comparatively short ranges. This deficiency could further be reduced by employing a later generation SRAAM, such as the MICA-IR or Israeli Python 4/5.
Conclusion
In terms of air-air combat the BVR advantage lies with the Mirage although by how much is hard to say (i.e. probably not by a lot), but closer in the Mig would outperform the Mirage by a massive margin.
Would a reborn Mirage-4000 match the latest Mig fighters?, page 1