I agree that Economic data with decent speed > High speed network. But there is still one more thing, that is much much more important. That is RELIABILITY. Reliability >> Economy > SPEED.
In my case, speed of Jio is much greater than Airtel (both 3G as well as 4G). Plus Jio is much economical OBVIOUSLY, comparing Airtel. I always use JIO for Prime Videos, YouTube, Tubemate, etc. I have 3 Jio numbers (incl one JioFi2 pocket router connection) each with Prime Rs999 done already and hence with SuSu offer -- 100GB for 3 months with NO daily FUP. But for simple, yet important jobs like, tatkal train ticket booking, net banking, even e-commerce (for cc transactions), I will use Airtel (even its 3G DC-HSPA+ is much reliable).
Just few days back, I was applying for passport for my relative online, using JioFi2. The net disconnects frequently and I got irritated, that I have to use my Airtel's 3G connection (with hotspot) to get the job done without any issues -- duration around 20 to 25 minutes. I got calls in between as well. Jio is NOT 100% reliable.
At first glance, everything looks great, right?? Great 23+ Mbps DL speed, 6+Mbps UL speed, just 50+ milli-second ping. Wonderful. But Just take note of two more things there, JITTER and SINR. Here Jitter is 150% of PING, WTF? For a data network with just 50ms ping, jitter is expected to hover in single digit of milli-sec only (worst case <20ms). Jitter shows abrupt change of latency (Not exactly, but something like that). Thank God, there is at least NO packet loss.
The second point is BAD SINR -- Signal to Noise Ratio. In Airtel, I have seen SINR @ 26dbm max and worse case it is >10 dbm. In Jio, I have seen even neg SINR values. This shows, still a hell lot of optimization needs to be done on their towers / equipments.
The reason I think is THE FREELOADERS. Even now, I know so many people who has NOT even done Rs99 prime recharge, enjoying 4G data (MyJio shows valid till 21 July -- WTF???) without any issues. Jio is THE modern day RobinHood of wireless data, who get money from paid customers and serve the FREELOADERS.
I am very very thankful to Jio, as they are the real reasons, we are getting affordable data tariffs. I used to pay 2000+ Rs every month for my single number to Airtel -- all for 8GB data + 10,000 minutes of free calls incl roaming + CUG. But right now I am just paying them Rs649, but getting UnLimited calls + 19GB data per month. I am almost getting thrice the benefits for one-third of the price now, all thanks to Jio for bringing the much needed competition in Telecom sector.
But wireless networks have limitations, (thanks to Physics) and by keeping on serving the FREE users will really hurt the experience for paid and loyal customers. I have even heard murmur of few users who have done Rs99+Rs303 recharge and they may NOT recharge after August, if freeloaders get free service till July (as per their myJio app). Jio must NOT forget that for MOST of their PAID customers, Jio is still SECONDARY sim only.