"tactical realism"/practicality is dumb in this series of all series as a design basis, it's all about style
i just really dislike the exposed business suit look vs the rolled up sleeves shirt + tactical strap look
there's also more color contrast in her dmc3 outfit due to the reddish boots and black/plaid miniskirt + shorts vs. the more uniform color of white/black/brown for her dmc4 one
edit:
that strap really does a lot to complete the design geez. maybe that's it
i just really dislike the exposed business suit look vs the rolled up sleeves shirt + tactical strap look
there's also more color contrast in her dmc3 outfit due to the reddish boots and black/plaid miniskirt + shorts vs. the more uniform color of white/black/brown for her dmc4 one
edit:

that strap really does a lot to complete the design geez. maybe that's it