Today's close
WT warrant is .43
to exercise/purchase assuming purchased today (.43 + .29 exercise price) x 18.2 = $13.1
WR warrant is .32
to exercise/purchase assuming purchased today (.32 + .58 exercise price) x 15 = $13.5

This is just my opinion and not financial advise but I can tell you that before the split it was one WT warrant was exercisable at $0.29 and that would get you .824 of a share. The $0.35 came from a poorly worded news release in November and what they meant was you get one share for $0.35. What they didn't make clear is that it takes 1.2 warrants to do that.
I posted this on another site a week ago and I'm not going to recalculate everything but you will get the idea. I'm not saying one is better then the other and if you disagree with the math please calculate it before you argue because there are multiple ways to do it and come to the same answer.

ATB price target in March 2021 was $1.40. 
After reverse split that would equal $1.40 x 15 = $21.00
Let's assume we hit that target. Lets also assume we care more about making money and less about comparing just 1 WT warrant to 1 WR warrant. The warrant prices are not always this far apart but this is just an example. Often there is 15-30% difference in price with WT typically being higher although I've even seen the WR trading higher then the WT briefly. 
 
Using $10,000 dollars as our funds to purchase HITI.WT warrants.
Closing price on May 14 was $0.37
With $10,000 you can purchase 27,027 HITI.WT warrants
Now if we exercise warrants:
We divide the warrants by 15 after reverse split which gives us 1,802
We now multiply x .824 to get the number of shares we can get which = 1,485
Another way to do the math is it takes 18.2 warrants to = 1 share which of course also = 1,485
So you need $0.29 to exercise each warrant = $7,838
The 1,485 shares are worth $31,185
Money spent was the initial $10,000 + $7,383 you have cash or beg/borrow/steal to exercise the warrant
$31,185 (current share value) - $10,000 (initial investment) - $7,838 (cost to exercise) = $13,347 which is profit if it was now sold at $21.00
133% increase.
 
Now using $10,000 we purchase HITI.WR warrants.
Closing price on May 14 was $0.28
With $10,000 you can purchase 35,714 HITI.WR warrants
Now if we exercise the warrants:
We divide the warrants by 15 and get 2,380
These warrants were previously 1 for 1 so we don't need to multiply x .824
Now we need $0.58 to exercise our warrants = $20,714
The 2,380 shares are worth $49,980
Money spent was the initial $10,000 + $20,714 you have cash or beg/borrow/steal to exercise the warrant
$49,980 (current share value) - $10,000 (initial investment) - $20,714 (cost to exercise) = $19,266 profit if it is sold at $21.00
192% increase.
 
If the price of the stock goes higher the percent gain on the WR warrant gets higher then the WT. 
 
Downside of the WR is you need to come up with more cash to exercise them. This typically in my experience only takes a few days so you would only probably need to use the cash for a week. Also, the volume is often low and on occasion even 0.
 
Downside of the WT is it typically trades higher so you can't purchase as many with the same amount of money and you need 18.2 warrants to get 1 share.