beam lateral bucking

[stm1A]

hi

i have 2 beams IPE300 S355 L=5000 mm. one is pinned the other is fixed supported.

In first case for lateral bucking  i choose Lcr=Lo with following shape of load:

for second beam i choose another shape of load:

first beam (simple supported) Mcr = 88 kNm      Lcr = 5000 mm

second beam (fixed support ) Mcr = 54 kNm       Lcr = 5000 mm

Mcr changes because changes coefficient C1 C2 of prospect F1.2 ENV 1993

but is it real that critical moment is lower for fixed beam than for simple support beam?

Do i have to reduce Lcr in fixed beam for compressed part only of both flages?

thanks