Python's random module, coin toss discrepency [duplicate]

I'm new to Python and doing a small project to simulate how often a streak of six heads or tails will come up in a random coin toss.

I came up with the code easy enough (I thought), but when I decided to try writing the code in a different way I noticed a discrepancy in the output. The first script tends to output a streak between 3% to 3.5% of the time. The second script tends to only output a streak 1.5% to 2% of the time. I've tried to think through the lines carefully to see if there is a reason for the difference in the way I've written the two scripts... but I can't see it.

Can anyone explain why the first script tends to produce more streaks than the second?

Script 1

import random

streak = 0

for number in range(10000):
    setOfSix = 0

    # Generate a random list of heads or tails.
    for tosses in range(6):
        flip = random.randint(0, 1)
        if flip == 0:
            setOfSix -= 1
        else:
            setOfSix += 1
    
    # Check if there is a streak in set of tosses
    if setOfSix == 6:
        streak += 1
    elif setOfSix == -6:
        streak += 1
    else:
        pass

print(streak)

Script 2

import random

streak = 0

for number in range(10000):
    setOfTosses = []

    # Generate a random list of heads or tails.
    for tosses in range(6):
        flip = random.randint(0, 1)
        if flip == 0:
            setOfTosses.append('T')
        else:
            setOfTosses.append('H')
        
    # Check if there is a streak in set of tosses.
    if 'H' and 'T' in setOfTosses:
        pass
    else:
        streak += 1

print(streak)