Share '1-3/4" vs. 2-1/2" Hi-rise pack'

Anyone have any input on 2-1/2" hi-rise packs. My department currently uses 1-3/4" and was possibly going to change this. Any info would be great especially as it relates to manpower/staffing of line and deployment . Current set up is building standpipe to 10' 2-1/2" to gated wye, to 150' of 1-3/4", to Akron Brass Chief low pressure nozzle. Thanks in advance for the feedback.