Alienware Laptops naming confusion

Sorted by LCD size. The dates (M/D/Y) are when they were RTS (released to sale).

M11x R1 (2/5/2010)
M11x R2 (6/8/2010)
M11x R3 (4/8/2011)

13 R1 (9/21/2014)
13 R2 (9/4/2015)
13 R3 (11/20/2016)

M14x R1 (4/8/2011)
M14x R2 (4/19/2012)
14 R1 (6/25/2013)
x14 R1 (2/22/22)
x14 R2 (2023)

M15x R1 (9/23/2009)
15 R1 (1/08/2015)
15 R2 (9/16/2015)
15 R3 (9/30/2016)
15 R4 (4/16/2018)
m15 R1 (10/24/2018)
m15 R2 (7/1/2019)
m15 R3 (5/21/2020)
m15 R4 (1/26/2021)
m15 R5 (5/4/2021)
m15 R6 (5/18/2021)
m15 R7 (2/28/22)
x15 R1 (6/15/2021)
x15 R2 (1/27/2022)

m16 R1 (1/17/2023)
m16 R2 (1/2024)
x16 R1 (3/17/2023)
x16 R2 (1/2024)

M17x R1 (6/02/2009)
M17x R2 (1/15/2010)
M17x R3 (1/08/2011)
M17x R4 (4/19/2012)
17 R1 (6/25/2013)
17 R2 (1/08/2015)
17 R3 (9/16/2015)
17 R4 (9/30/2016)
17 R5 (4/16/2018)
m17 R1 (1/06/2019)
m17 R2 (7/01/2019)
m17 R3 (5/21/2020)
m17 R4 (1/26/2021)
m17 R5 (4/18/2022)
x17 R1 (6/15/2021)
x17 R2 (1/27/2022)

M18x R1 (5/03/2011)
M18x R2 (4/19/2012)
18 R1 (7/02/2013)
m18 R1 (1/20/2023)
m18 R2 (1/2024)

Area-51m R1 (1/21/2019)
Area-51m R2 (6/22/2020)