Let's take 9 mpg difference b/w the two. Of course, if you drive city more, then the difference will be greater...and vice versa for highway.
Assume 12,000 miles driven a year. If you drive more than 12k miles / year, then the difference in cost will be greater.
At least around me, REGULAR gas costs $3.10; PREMIUM gas costs about 35 cents more, $3.45. YMMV.
200t: 24 mpg (combined)
12,000 miles / 24mpg = 500 gallons used.
500 x $3.45 = $1,725 / 12,000 miles driven.
300h: 33 mpg (combined)
12,000 miles / 33mpg = 363.6 gallons used.
363.6 x $3.10 = $1,127.16 / 12,000 miles driven.
DIFFERENCE = $597.84 / 12,000 miles driven.
So, it all depends on the price difference b/w equally-equipped
200t vs. 300h. (BTW, $597.84 x 7 years = $4,184.88...just FYI.)
NOW, this is ONLY about gas consumption.
Hybrids do NOT
require starter, transmission maintenance, belt vs. chain (not sure about 200t engine, but i think hybrids are chain-driven), and brakes maintenance & replacement. Oil changes may differ too. Again, the last part is questionable since we don't know if 200t engine requires any special oil or how long in b/w changes.
As noted previously in my other post, hybrid batteries (from Toyota) are proven beyond doubt that they can last well past 200k miles. And used (or even new) batteries are fairly cheap...around $2000 (new). Think of it this way...if i make it to 150,000 miles (worst case
scenario), and all i had to spend was $2000 on maintenance outside of oil changes and tire rotations, then i did pretty good IMO!
Toyota hybrids generally have good resale value.
So, it's up to your priorities...but i am sticking with 300h.