I disagree, J-10B will see active service because
1- it offers a lot more over standard J-10 model so even PLAAF will be eagerly eyeing this as standard J-10 variant
2- The details of PAF deal indentified J-10 and even ACM said that PAF has no contribution towards 5th Gen which implies that PAF has not been eyeing J-20.
I agree with the post a above that J20 Might be FC20 at the end..Becuase FC20 contract was sighned in 2007 when airforce reduced number of F16.. and J10 Contract was sign in Nov 2009...since few years we are hearing abt J10 and FC20 being inducted...made many ppl confuse if we are getting J10...and no confirmed news in available where PAF has catagorically stated that pakistan has no contribution in 5th gen fighter....however even if we dont hve any contribution in RND that does not mean we cannot get it...
Regards