What if morphology and spectrascopy swapped?

If that happens then this happens.
Ellipticals are the same with this type.

Today’s modern classification scheme. De-Ganculars argued that spiral arm texture does not belong, just stellar and nebular population.

Disk Galaxies
M = Type Sd, Sm, Irregular
image
K = Type Sc


G = Type Sc

F = Type Sb - Sc
image
A = Type Sab, Sb

B = Type S0, S0a, Sa
image

Now type O stars are ellipticals that dominate a galaxy cluster.

Just Elliptical Galaxies

M
image
K


G
image
F

A
image
B

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Not quite sure I understand. Do you mean de Vaucouleurs? What do you mean by “[swapping morphology] and spectroscopy”?

No, I swapped Spectral type and Hubble Scheme, for my If galaxies and stars swapped places project.