The Bradley and CV90 as mentioned are both Infantry Fighting Vehicles (IFV) weighing in the ~23 - 25 ton range.
The Bradley mounting a 25mm cannon and a number of TOW missiles (AFAIK varies depending on whether M2 or M3 and role) and a crew and 6-7 passengers (M2) or 2 scouts (M3).
Th CV90 mounts a 30mm - 40mm cannon depending on version and has a crew of 3 plus 8 passengers.
Given that they are both IFVs, they are armed and armoured to allow them to deploy and then support their embarked troops on a battlefield. An APC on the other hand, is generally intended to safely deploy their embarked troops and then withdraw until needed to redeploy. They are not intended, generally, to provide support other than protected transport onto a battlefield. An IMV (Infantry Mobility Vehicle) is intended to provide protected transport for troops like an APC is, but typically not onto an actual battlefield. Rather, they are to provide transportation through threatened areas where the risk of attack due to mines, IED, ambush etc are sufficient so that regular unarmoured transportation is inadvisable.
As for the M113, I do not know what the expected weight of the Aussie M113A3/4 (~18 tons full load?), the original M113 weighted in ~11 tons and AFAIK was armoured to protect against 7.62mm AP and possibly also against 0.50 cal. Not sure on that one, since armoured was/is ~44mm aluminum which I believe is around 50% more than needed vs. 7.62mm AP. The Tenix brochure
here does not mention any changes to crew capacity, which could mean it was still at 11. Finally the A3/A4 will be armed with either 0.50 cal or 7.62mm MGs.
Given the differences in capabilities between the M113 and the CV90 or M2/M3, that is why I question comparison attempts between such vehicles, even for reliability. Anything other than questions about something like mechanical reliability under normal/peacetime conditions then can have a number of different variables that would effect comparisons between dissimilar vehicles. Now if the comparison was between the M113A3/4 and a British FV432, or between the Bushmaster and S600 IMVs, that would be another story.
-Cheers