Compare resource usage month over month

Postgres SQL, as run

select date_trunc('month', charge_period_start at time zone 'UTC') as charge_month,
       provider_name as provider_name,
       service_name as service_name,
       resource_id as resource_id,
       sku_id as sku_id,
       consumed_unit as consumed_unit,
       sum(consumed_quantity) as total_consumed_quantity
from focus.cost_and_usage
where charge_category = 'Usage'
  and charge_period_start >= $1::timestamptz
  and charge_period_end < $2::timestamptz
group by date_trunc('month', charge_period_start at time zone 'UTC'), provider_name, service_name, resource_id, sku_id, consumed_unit
order by total_consumed_quantity desc nulls last, charge_month asc, provider_name asc nulls last, service_name asc nulls last, resource_id asc nulls last, sku_id asc nulls last, consumed_unit asc nulls last
limit 500

Parameters: $1 = period_start, $2 = period_end

Original FOCUS SQL

SELECT 
  MONTH(ChargePeriodStart),
  ProviderName,
  ServiceName,
  ResourceId,
  SkuId,
  ConsumedUnit,
  SUM(ConsumedQuantity) AS TotalConsumedQuantity
FROM focus_data_table
WHERE ChargeCategory='Usage'
  AND ChargePeriodStart >= ? and ChargePeriodEnd  < ?
GROUP BY
  MONTH(ChargePeriodStart),
  ProviderName,
  ServiceName,
  ResourceId,
  SkuId,
  ConsumedUnit