**different masaajids follow different fiqh so their timings can be different...NOT a big deal! some tend to do it awwal waqt some with taaKheer.
i follow the rule of thumb in doing my prayers. the only thing u have to know is ur sunset and sunrise times. it's as follows:
fajar: dawn to 5 min b4 sunrise
zohr: 15 min after zawaal till 2 hours before sunset
asr: 90 minutes b4 sunset until 5-10 min b4 the sunset
maGhrib: zaahir hai at sunset
'ishaa: 90 minutes after the sunset until 10 min b4 tha night zawaal
they usually use hanafi or shafi methods to calculate times thats why you see difference in times.
i’ll say read namaz according judgement. for example here in uk when they used to show azaan (london) of esha on tv therefore i used to read it after half an hour to 90 mins in manchester.
also u can go to one of your local mosques and get a calender from there.
if there is no mosque then u can ask muslim families in your area. if cant do that either then i’ll say that just pick one of the timetables and follow your namaz according to that because too much thinking will confuse u