The second larva appears to be a matured larva with a size measuring up to 35 mm from head to tail. It doesn't look quite like a Gynacantha larva because it has a slim abdomen. Maybe I'm wrong.... it might be just a Gynacantha larva after all......
Anyway, both the larvae are male, and I am breeding them.
I have a second thought of the large aeshnid larva (the first photo above). I just feel that it doesn't seem to look truly like a Indaeschna grubaueri larva as the shape of head-eye of the large larva is just not matching too well. The head-eye shape of this large larva resembles that of Anax guttatus. However, the only trouble is that the abdominal segment joints of this larva resemble that of I. grubaueri not A. guttatus.