Cross field transport in the edge of magnetically confined plasmas is known to be turbulent in nature, specifically the transport is composed largely of plasma filaments. Understanding and quantifying this transport is of key importance when considering particle and heat loads for future devices. Filament velocity scaling laws, derived using linearised drift-fluid models, and reproduced through fluid simulations are of key importance when considering filament propagation. They are also used in statistical models of the edge that relate filamentary fluctuations to mean scrape-off-layer (SOL) profiles. These same velocity scaling laws are reproduced herein both computationally and theoretically with a deviation identified and explained in the limit of small filament widths. Filament simulations have been carried out using a gyrofluid model known as GEM (electromagnetic gyrofluid model), implemented in the BOUT++ (BOUndary Turbulence in C++) framework, both with the inclusion of finite Larmor radius (FLR) effects and also with the gyroaverage operators taken in the limit of small Larmor radius to resemble drift-fluid models. Simulations were carried out over a range of filament sizes and a simplified slab geometry was employed with parameters chosen to represent typical conditions in the edge of the Mega Ampere Spherical Tokamak (MAST). Good agreement with the sheath-limited velocity scaling relation is found in both the drift-fluid limit and when FLR effects are included. Agreement is also found with the inertial limit when simulations with GEM are carried out in the drift-fluid limit. However, a deviation from the inertial velocity scaling relation is observed when FLR effects are included. This deviation is explained through linearisation of the underlying equations. Finally, edge profiles and radial heat flux decay length are interpreted through radially averaged profiles of self-consistent turbulent simulations that include both the core and the SOL.